Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Acoustic Vibration"”.
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In-Situ Defect Detection Using Acoustic Vibration Monitoring for Additive Manufacturing Processes
… in-situ monitoring techniques, such as visual or acoustic monitoring, a secondary level of quality assessment can be performed. This type of real time monitoring solution can be used in a variety of ways to help reduce scrap rate, increase overall quality, and improve the mechanical …
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Evaluating the effects of acoustic stimulation on fibroblast cell migration and muscle fibre formation.
… of mechanical stimulation, delivered via acoustic vibration, can be used to control complex cell behaviours. Much of the work in this area has focused on the effects of mechanical stimulation upon bone cells. Very little has been done to investigate the effects of mechanical stimulation on …
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Passive harmonic generation at spring contacts
… the third paper, a measurement system which uses acoustic vibration to locate passive intermodulation (PIM) sources in base station antennas is presented. This measurement system uses mechanical vibration to modulate the PIM signal. By introducing the acoustic vibration at different locations in …
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Embracing the shadows : inhabitation of an infrastructural landscape
… challenges such as light and shadow, acoustic vibration, wind load, water flow, and multiple cross-grain circulations, programmatic and experiential layers are woven into the existing infrastructure to create a system of mutually reinforcing connective tissues.
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The role of system dynamics on the behavior of elastomeric friction
Friction induced vibration of an epoxy coated shaft rotating in an elastomeric bushing is investigated. This study investigates the manner in which system dynamics and friction mechanisms are responsible for friction induced vibration and noise generation. A test method was developed to measure the …
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Flow induced acoustic resonances in heat exchangers.
This thesis describes an investigation into the acoustic phenomenon in in-line tubular heat exchangers subjected to cross flow. The flow through such a heat exchanger can result in the production of very high noise levels, which occur as a result of the excitation of an acoustic standing wave in …
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Near-Field Pressure Distributions to Enhance Sound Transmission into Multi-Layer Materials
… significant energy transfer from incident acoustic waves across the air-material interface. Refraction also plays a role in preventing acoustic transmission, as the wave speed difference between air and solid materials results in an increase of the resulting propagation angles, creating …